Method of winding a coil of wire



Patented May 19, 1925.

UNITED STATES PATENT OFFICE.

METHOD OF WINDING A COIL 0F WIRE.

Application filed November 25, 1924. Serial No. 752,252.

To all whom it may concern:

Be it known that we, WILLIAM A. PREN- TISS and HUGO PoETsoH, citizens ofthe United States, residing at Holyoke, in the county of Hampden andState of Massachusetts, have invented new and useful Improvements inMethods of Winding a Coil of lVire, of which the following is aspecifintion.

This invention relates to improvements in the method of winding orforming a coil of wire, either rectangular or circular in cross section.

Broadly the invention consists in inserting the inner end of the wire ina slot or groove in the hub of a winding spool on which the coil is tobe formed. Then inserting between the inner end of the wire and hub ofthe spool a member consisting of a piece of flexible material, as pasteor card board, then rotating the wire coil winding spool in the usualmanner whereby the piece of flexible material is simultaneously bent orfolded about the hub of the winding spool by the inner turns of the wireas the spool is rotated. This member is firmly retained in place on thehub by the successive turns of the coil wire. The length of the strip offlexible material is preferably equal to the circumference of the hub ofthe spool so that its ends will meet when the winding is completed.After the winding of the coil is completed tie wires are next passedabout the coil, both transversely and circumferentially of the same.Thetransverse tie wires being passed through the opening of the coil.These wires areloclzed together where they cross each other, with theresulting cifect thatthe turns of the coil of wire are firmly retainedin place. The tie wires are passed through the axial opening of the coiland engage the inner surface of the piece of flexible materialthusretaining this member firmly in place. The piece of flexible materialserves the additional purpose of accurately positioning the inner turnsof the coil of wire so that it may be readily slipped onto a spool orreel for unwinding purposes, as used in a. stitching machine.

Eeferring to the drawings:

Fig. 1 is a perspective view of a portion of a coil winding spoolshowing only one of the spool heads in place with the usual slots forreceiving the binding wires and illustrating the inner end of the coilof wire inserted in one of the slots of the hub of the spool and withthe flexible material member inserted in the inner end ofthe wire.

Fig. 2 shows a view of the completed coil removed from the winding spoolwith the binding wires in place and the flexible ma 'terial memberlocated within the inner turns designates one of the collapsible sectorsof the hub ofone form of winding spool with the sectors shown spacedfrom each other to provide the openings 4:. 5 designates the inner endof the wire which is to be wound on the spool. Its inner end is bent asin dicated at 6 for 1nsertion in one of the spaces 4 for retaining thesame against displacement when the spool is rotated. Be

fore the spool is rotated for winding the wire a flexiblemember 7 isinserted between the inner end 5 and. the hub sections. This member maybe composed of any suitable mate-rialv as paste or cardboard and of alength equal to the circumference of the hub sectionswhereby its endswill justineet as indicated at 8. As the winding spool is rotated theflexible member 7 is'automatically wrapped around the hub sections thesuccessive turns operating to retain this member in place, and operateto form a hollow core for the coil.

After the winding is completed the turns are retained in place bybinding wires. In the construction shown the tie wire is applied asfollows: One end of the wire is passed through the axial opening of thecoil and in contact with the inner surface of the flexible member 7.This end is brought around and transversely of the turns of wire asindicated at 9 where its end 9 is twisted, about the free end 10. Thisfree end is now carried circumferentially and transversely of the coilby passing the strand 11 transversely about the turns as indicated at 12when it is carried through the opening 13, then upward at 14, thenlooped around the portion 10 at 15, (see Fig. 2) then forward at- 16,where it is again passed through the opening 13 and transversely aroundthe coils as indicated at 17, where it is looped with the wire 16-. Itis again looped about the turns of the coil as indicated at 18,

and so on until the starting tie at 9 is reached where its free end istwisted about the strand 10, as indicated in Fig. 3 at 19, in Fig. 3. Inother words the tie wire is looped about the finished coil in both atransverse and circumferential manner whereby the turns are eflectuallyprevented from becoming displaced.

It is to be understood that the transverse loops 9, 11, 17, and 18are'temporarily located in the openings 2 of the spool.

The finished hollow cylindrical core 7 serves the purpose of effectuallyretaining the inner turns of the wire in place, also its inner surface 7provides a very suitable means on which to place any data relating forinstance to the size or quality of the wire which is wound thereon. Itmay be used for advertising purposes, if desired.

Our present invention relates to the formation of a cylindrical shapedmember from a strip of any suitable flexible material at the same timethat wire or the like material is wound upon the flexible material. Theinvention is not necessarily confined to the winding of a coil of wire.In practice we find that paper or paste board is very desirable materialto use in the formation of the cylindrical shaped core. The cylindricalshaped core of paper about which the turns of a coil of wire are woundis comparatively inexpensive and may be discarded when the core of wireis used. Although the drawings illustrate the coil of wire as ribbon, orrectangular in cross section, it is to be understood that wire which iscircular in cross section may be readily wound about the strip offlexible material.

hat we claim is: r

1. The method of forming a coil of wire which consists in temporarilyconnecting the inner end of the coil to the hub of a winding spool, theninserting a flexible member beneath the inner end, then rotating thespool to wind the coil onto the spool and simultaneously wrap theflexible member about the hub of the winding spool, whereby the openingof the finished coil is provided with a lining.

2. The method of forming a coil of wire which consists in temporarilyconnecting the inner end of the coil to the hub of a winding spool, theninserting a flexible member beneath the inner end, then rotating thespool to wind the coil onto the spool and simultaneously wrap theflexible member about the hub of the winding spool, then securing theturns of the coil and flexible member in place with binding wires,whereby the opening of the finished coil is provided with a lining.

3. The method of forming a coil of wire which consists in temporarilyconnecting the inner end of the coil to the hub of a winding spool, theninserting a flexible member beneath the inner end,- then rotating thespool to wind the coil onto the spool and simultaneously wrap theflexible memher about the hub of the winding spool, then securing theturns of the coil and flexible member in place with binding wires, thebinding wires being arranged both transversely and circumferentiallyofthe coil, whereby the opening of the finished coil is provided with alining;

4. A method of forming a cylindrical shaped core of flexible materialfor a coil of wire which consists in temporarily securing the inner endof the wire to the mandrel of a winding member,the'n inserting the innerend of the flexible member beneath the inner end of the wire and windingthe wire on the member whereby the flexible member is wound about themandrel of the winding member,

5. A method of forming a cylindrical shaped core of flexible materialfor a coil of: wire which consists in temporarily securing the inner endof the wire to the mandrel of a winding member, the inner end of theflexible member being beneath the inner end of the wire and winding thewire on the member and about the flexible material on the mandrel, thesaid core being retained in place with a suitable binding device whichis passed around the wire and within the core.

6. The method of forming a cylinder from a strip of flexible materialwhich consists in suitably supporting the strip on arevolvable mandrel,then winding wire or the like article about the flexible material forwinding the flexible material about the mandrel, the inner end of thesame strip being inserted below the inner end of the wire.

7. The method of forming a cylindrical shaped article or core for acoilof wire from a strip of paper" or like flexible material by winding orwrapping wire or the like about the strip, the inner end of the stripbeing suitably supported during the winding operation on a mandrel,whereby the strip is wound about the mandrel by the wire. l

8. The method of forming a cylinder from a strip of flexible materialwhich consists in suitably supporting the strip, then Winding Wire orthe like article about the flexible material, the inner end of the saidstrip being inserted below the inner end of 5 the strip.

9. The method of forming a cylindrical shaped article or core from astrip of paper or like flexible material by Winding 0r Wrapping Wire orthe like about the strip, the inner end of the strip being suitably sup-10 ported during the Winding operation.

WVILLIAM A. PRENTISS. HUGO POETSOH.

